Creating of nodes and edges in .vtu format

Moving forward making vtu an independent format.

Now fpakc can generate nodes and edges from vtu input.
Next step is cells.

Some minor corrections in gmsh2 format to unify statements.
The reading of meshes needs a good overhaul.

Testing all geometries with vtu is gonna be fun...

src/modules/solver/moduleSolver.f90

@@ -514,7 +514,6 @@ MODULE moduleSolver
       USE moduleSpecies
       USE moduleCompTime
       USE moduleProbe
-      USE moduleMeshOutputVTU !TEMPORARY TO TEST VTU OUTPUT
       IMPLICIT NONE
 
       INTEGER, INTENT(in):: t
@@ -528,11 +527,8 @@ MODULE moduleSolver
 
         CALL outputProbes(t)
         CALL mesh%printOutput(t)
-        CALL printOutputVTU(mesh, t) !TEMPORARY TO TEST VTU OUTPUT
         IF (ASSOCIATED(meshForMCC)) CALL meshForMCC%printColl(t)
-        IF (ASSOCIATED(meshForMCC)) CALL printCollVTU(meshForMCC,t) !TEMPORARY TO TEST VTU OUTPUT
         CALL mesh%printEM(t)
-        CALL printEMVTU(mesh, t) !TEMPORARY TO TEST VTU OUTPUT
         WRITE(*, "(5X,A21,I10,A1,I10)") "t/tFinal: ", t, "/", tFinal
         WRITE(*, "(5X,A21,I10)")        "Particles: ", nPartOld
         IF (t == 0) THEN
@@ -565,7 +561,6 @@ MODULE moduleSolver
       !Output average values
       IF (useAverage .AND. t == tFinal) THEN
         CALL mesh%printAverage()
-        CALL printAverageVTU(mesh) !TEMPORARY TO TEST VTU OUTPUT
 
       END IF